- Category: Populated Place
- Type: Village
- Latitude/Longitude: 50°6'45"N 5°14'50"W
- Eastings/Northings: 167919, 28673
- OS Grid: SW679286
- Mapcode Local: GBR Z2.B4MX
- Mapcode Global: VH134.0F6G
Location and coordinates are for the approximate centre of Trewennack within this administrative area.
Geographic features and populated places may cross administrative borders.